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Coupled design of high-speed motor drive and shaped optimized compressor systems.

Number: 1483

Author(s) : DING X., CASTILLO C., DICKERSON M., PEKAREK S., ZIVIANI D.

Summary

The heating, ventilation, air conditioning & refrigeration (HVAC&R) industry is undergoing the transmission from conventional high-Global Warming Potential (GWP) refrigerants to low-GWP refrigerants. Despite of the environmental benefits, the usage low-GWP fluids also yield to lower compressor volumetric capacities. This research aims at exploring the potential for meeting the capacity requirements while using low-GWP refrigerants by increasing the speed range of variable speed compressors. Running at higher speeds is particularly important during heating mode to provide greater capacity at low ambient temperatures. However, although promising, if such operation is considered without integrated design of the electric drive, the results are likely to be suboptimal. This is because that increasing the speed of an electric machine that is not tailored for a wide speed range will likely come at the expense of increased core and semiconductor losses. To meet this need, this study develops the coupled design of variable-speed compressors by two well-established tools. On the compressor side, the mechanistic compressor modeling tool positive displacement machine simulation package (PDSim) enables detailed design of the high-speed scroll compressor. A machine learning ANN model is also constructed as a light-weight alternative to the PDSim model. On the motor drive side, the multi-objective optimization toolbox electric driver optimization toolbox (EDOT) enables the rigorous multi-physics design of suitable motors. A method-of-moments engine then is used to test and validate the performance of the new designed high-speed compressor. This study takes R290 as the working fluid. Torque force, volumetric efficiency, and overall isentropic efficiency were recorded from PDSim results. Three corresponding optimized compressor-motor designs were selected among 150 design results. The height and radius of the newdesigned compressor is around 20% and 15% less than that of the reference case, respectively. The volume of the newdesigned compressor can be up 45% less than the reference case. While the power losses of the optimized cases are approximately equal to the reference case.

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Details

  • Original title: Coupled design of high-speed motor drive and shaped optimized compressor systems.
  • Record ID : 30030369
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15
  • Document available for consultation in the library of the IIR headquarters only.

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